Relationships between gas-exchange characteristics and stomatal structural modifications in some desert grasses under high salinity

Title:

Relationships between gas-exchange characteristics and stomatal structural modifications in some desert grasses under high salinity

Creator:

Naz, N., Hameed, M., Ashraf, M., Al-Qurainy, F., and Arshad, M.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:1ea05909-12d0-4ca9-8ccf-2d420925cc67
uuid:1ea05909-12d0-4ca9-8ccf-2d420925cc67
issn:0300-3604
doi:10.1007/s11099-010-0059-7

Subject:

botanika, botany, desert grasses, stamatal regulation, stamatal structural modifications, transpiration rate, and water-use efficiency

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Two populations, one from lesser saline Derawar Fort (DF) and the other from highly saline Ladam Sir (LS) in the Cholistan desert, for each of the five grass species, Aeluropus lagopoides, Cymbopogon jwarancusa, Lasiurus scindicus, Ochthochloa compressa, and Sporobolus ioclados were examined to investigate the influence of salinity on structural and functional characteristics of stomata. Salinity tolerance in A. lagopoides mainly depended on controlled transpiration rate (E) and high water-use efficiency (WUE), which was found to be regulated by fewer and smaller stomata on both leaf surfaces as well as stomatal encryption by epidermal invaginations. C. jwarancusa had sunken stomata on the abaxial surface only, which largely reflected a reduced E, but less affected stomatal conductance (gs) or WUE. L. scindicus had fewer but larger stomata along with hairs/trichomes which may function to avoid water loss through transpiration, and hence, to attain a high WUE. In O. compressa stomata were found only on the abaxial surface and these were completely encrypted by epidermal invaginations as well as a dense covering of microhairs, which was associated with a low E and high WUE under salinity stress. In S. ioclados, the traits of increased stomatal density and decreased stomatal area may be critical for stomatal regulation under salt-prone environments. High stomatal regulation depended largely on stomatal density, area, and degree of encryption under salinity, which is of great ecophysiological significance for plants growing under osmotic stresses. and N. Naz ... [et al.].

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

446-456

Source:

Photosynthetica | 2010 Volume:48 | Number:3

Harvested from:

CDK

Metadata only:

false